120 
102. 
1038. 
104. 
105. 
106. 
CALIFORNIA ACADEMY OF SCIENCES. 
PEATE 2S ry: 
ECLIPIDRILUS FRIGIDUS. 
The central part of the dissected prostate and male organ, as seen when mounted in gum-thus. This figure 
represents the narrow part of the prostate or tube, connecting the lower or glandular part with the upper or 
storage part. The two spermducts are marked much more strongly than they appear and are more spread 
or separated. The drawing represents views at two different foci. Zeiss C. Eyep. 3, t. 165. a. the posterior 
part or storage chamber in which the spermducts open at j. sp. The anterior end of this chamber is lined 
by a very thick epithelium, which however rapidly diminishes in thickness backwards. 6. the very narrow 
part connecting the posterior storage chamber with the anterior prostate. c. the anterior prostate. out. 
outer layers of the storage chamber and prostate, surface views. Ju. lumen of storage chamber. dum. lumen 
of prostate. ep. very thick epithelium at the anterior end of the storage chamber. j. sp. junction of sperm- 
ducts and storage chamber. /.v. lateral longitudinal blood vessels. se. septum between xiv/xv. spt. sep- 
tum between xv/xvi. spd. spermducts. 67. narrow part of prostate or bridge. g/l. glandular layer of 
prostate. ept. lining-epithelium of prostate, 
The anterior end of the storage chamber, dissected, mounted in gum-thus. The focus is set on the inner 
concave surface, showing the junction of spermducts and bridge with the storage chamber proper. sp. the 
pores where enter the two spermducts. outer. coats of muscles and small prostate glands of the storage 
chamber. br. bridge or narrow part of the prostate. 
Longitudinal section of the body-wall, showing posterior ciliated rosette, etc., behind the male pore. 
The inner end of the former more highly magnified. The letters indicate the same as in the last figure. 
Only some of the larger prostate glands are figured. Zeiss C. Eyep. 3. 
A part of the former more highly magnified. Zeiss Hom. Im. 1-12, Eyep. 3-155. The letters indicate the same 
as in tig. 104. This section is more parallel with the longitudinal axis of the organ. The cell walls of the 
epithelial cells were not distinct, probably on account of maceration. 
